/*******************************************************************************
 * Copyright (c) 2008-2009 zhang yuexiang.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 
package org.xfeep.asura.bootstrap.config;

import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;

import org.xfeep.asura.core.config.ConfigLoader;
import org.xfeep.asura.core.config.LazyConfigInfo;

public class XmlDirConfigLoader implements ConfigLoader {

	public static final String ASURA_CONFIG_HOME = "asura_config_home";
	
	JAXBContext jaxbContext;
	protected File xmlDir;
	protected List<LazyConfigInfo> list = new ArrayList<LazyConfigInfo>();
	
	public XmlDirConfigLoader(String dir) {
		xmlDir = new File(dir);
		try {
			jaxbContext = JAXBContext.newInstance();
		} catch (JAXBException e) {
			throw new RuntimeException(e);
		}
		File[] fs = xmlDir.listFiles();
		if (fs == null){
			return;
		}
		for (File f : fs){
			if (f.getName().toLowerCase().endsWith(".xml")){
				list.add( new XmlConfigLoader(f).lazyConfigInfo);
			}
		}
		
	}
	
	public XmlDirConfigLoader() {
		this(getXmlDirFile());
	}
	
	public Iterator<LazyConfigInfo> iterator() {
		return list.iterator();
	}
	
	public static String getXmlDirFile() {
		String homePath = System.getProperty(ASURA_CONFIG_HOME);
		if (homePath == null){
			homePath = System.getProperty("user.dir") + "/conf";
		}
		return homePath + "/xmls";
	}

}
